For a given input string str, find how many spaces are there in the string and replace those spaces with *
e.g. str = 'this is demo of replacing spaces with stars';
out = 'this*is*demo*of*replacing*spaces*with*stars'
Return the 3n+1 sequence for n
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Flip the main diagonal of a matrix
03 - Matrix Variables 4
Check if equal
Create a v-notch vector without "sort" function
Let's get back to school: create mixed numbered fraction
Broken numlock key, oppps !
Find offset of given matrix element from first matrix element
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